Please help me with I2C communication between LCD and PIC!

[electrodarkness]

HI everyone!

I want to develop an interface for a project. On this Interface There is an I2C 2x16 LCD (attached datasheet), SPI communication with main board,UART for debugging. The micro controller used is a PIC18F26K22 (attached schematic).
The problem is, the LCD won't display anything. I tested the I2C in Proteus, and with logic analyzer, and the written data is sent. I can't find the problem.

Any help would be appreciated!

 

[milan.rajik]

If you are testing in Proteus then you have to connect I2C debugger. Are you sure there is I2C LCD in Proteus ?

Zip and post the complete MPLAB X XC8 project files and Proteus file.

 

[Easyrider83]

Take this project as the reference. There are same LCD working with I2c port expander.

 

[electrodarkness]

milan.rajik In proteus indeed I'm using I2C/SPI debugger, but I'm also testing it on The finished hardware.
I attached the proteus and MPLAB projects.
Easyrider83 Thanks for the code, I think I didn't put testing in cycle after sending data. I will try it as soon as possible.